arecord answer me this : arecord -l **** List of PLAYBACK Hardware Devices **** card 0: codec [xxxxxxx audio codec], device 0: xxxxxx xxxxxx-I2S-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0 After looking for traces in pcm.c and sound.c, I've found this : soc_new_pcm playback 1, capture 1 snd_pcm_dev_register str pcmC0D0p snd_register_device_for_dev minor 16 snd_pcm_dev_register str pcmC0D0c snd_register_device_for_dev minor 24 snd_register_device_for_dev minor 0 My pcmC0D0x minor devices were wrong :'( i've remade them and now it works. Thanks a lot. Regards, Alex. -----Message d'origine----- De : Clemens Ladisch [mailto:cladisch@xxxxxxxxxxxx] Envoyé : vendredi 11 janvier 2008 14:17 À : Alexandre BOUIN; alsa-devel@xxxxxxxxxxxxxxxx Objet : Re: ALSA : Can't open capture device Alexandre BOUIN wrote: > I'm working on an intern project, using an AT91SAM9260EK-based board, > embedded system. > Our kernel contains a full ALSA 1.14 with ASoC layer. > Our ASoC driver works well in capture and playback, if we are using OSS > layer or directly /dev/dsp. > So I need some tips on ALSA layer side : > > here you can see that my device is created : > ll /dev/snd/ > crwxrwxrwx 1 root root 116, 0 Dec 26 2007 controlC0 > crwxrwxrwx 1 root root 116, 4 Dec 26 2007 hwC0D0 > crwxrwxrwx 1 root root 116, 14 Dec 26 2007 pcmC0D0c > crwxrwxrwx 1 root root 116, 16 Dec 26 2007 pcmC0D0p > ll /dev/dsp > crwxrwxrwx 1 root root 14, 3 Dec 26 2007 /dev/dsp > > A cat on playback device works (I added some traces in kernel) : > cat < /dev/snd/pcmC0D0p > snd_pcm_open : enter > snd_pcm_open_file : before snd_pcm_open_substream > snd_pcm_open_file : after snd_pcm_open_substream > cat: read error: Invalid argument > > But a cat on capture device does not work : > cat < /dev/snd/pcmC0D0c > -sh: cannot open /dev/snd/pcmC0D0c: No such device Does the capture device appear in /proc/asound/devices or in the output of "arecord -l"? Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
